#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <vector>
#include <algorithm>
using namespace std;

const int NMAX = 2000010;

int N, M, Z[NMAX], MatchCnt;
char Pattern[NMAX], Text[NMAX];
vector<int> MatchPos;

void BuildZ()
{
    Z[1] = 0;
    for(int i = 2, C = 1, Right = 1; i <= N; ++ i)
    {
        if(Right >= i) Z[i] = min(Right - i + 1, Z[i - C + 1]);
        for(; i + Z[i] <= N && Pattern[Z[i] + 1] == Pattern[i + Z[i]]; ++ Z[i]);
        if(i + Z[i] - 1 > Right)
        {
            C = i;
            Right = i + Z[i] - 1;
        }
    }
}

void Z_Algorithm()
{
    BuildZ();
    for(int i = 1, C = 0, Right = 0; i <= M; ++ i)
    {
        int LCP = 0;
        if(Right >= i) LCP = min(Right - i + 1, Z[i - C + 1]);
        for(; LCP < N && i + LCP <= M && Pattern[LCP + 1] == Text[i + LCP]; ++ LCP);
        if(i + LCP - 1 > Right)
        {
            C = i;
            Right = i + LCP - 1;
        }
        if(LCP == N)
        {
            MatchCnt ++;
            if(MatchCnt <= 1000) MatchPos.push_back(i - 1);
        }
    }
}

int main()
{
    freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);

    gets(Pattern + 1); N = strlen(Pattern + 1);
    gets(Text + 1); M = strlen(Text + 1);

    Z_Algorithm();

    printf("%i\n", MatchCnt);
    for(int i = 0; i < MatchPos.size(); ++ i) printf("%i ", MatchPos[i]);
}